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Finding the Fourth Proportional to 18,703.50, 28,067.40 and 9,469.50

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Solution

The fourth proportional to 18,703.50, 28,067.40 and 9,469.50 is: 14,210.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.50 : 28,067.40 = 9,469.50 : x
  2. Step 2: Convert to fraction form
    18,703.50/28,067.40 = 9,469.50/x
  3. Step 3: Cross multiply
    18,703.50x = 28,067.40 × 9,469.50
  4. Step 4: Simplify right side
    18,703.50x = 265,784,244.30
  5. Step 5: Solve for x
    x = 265,784,244.30/18,703.50
  6. Step 6: Final answer
    x = 14,210.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.